diff --git a/examples/mrbgems/mruby-YOUR-bigint/TODO-HINT.md b/examples/mrbgems/mruby-YOUR-bigint/TODO-HINT.md
index 4027df969..d1877f517 100644
--- a/examples/mrbgems/mruby-YOUR-bigint/TODO-HINT.md
+++ b/examples/mrbgems/mruby-YOUR-bigint/TODO-HINT.md
@@ -10,7 +10,7 @@ The file structure in this example is as follows:
 +- mruby-YOUR-bigint/   <-  Make this directory public if necessary.
     |                       Change the name of copied directory.
     |
-    +- TODO-HINT.md     <-  This file is currently viewing by you.
+    +- TODO-HINT.md     <-  You are currently viewing this file.
     |                       Remove this from copied directory.
     |
     +- core/
@@ -21,19 +21,19 @@ The file structure in this example is as follows:
                             May be depended on by other GEMs.
 ```
 
-Implementors of own bigints should copy below this directory to another directory and do the following:
+Implementors of their own bigints should copy below this directory to another directory and do the following:
 
 - Rewrite `spec.author`, `spec.license`, `spec.homepage` and `spec.summary` in `<gem-dir>/mrbgem.rake` file to those of your own implementors.
 - Implement the respective functions in `<gem-dir>/core/bigint.c`.
   - Define and use an object structure for `MRB_TT_BIGINT` type-tag.
-    It is recommended to use `mrb_static_assert_object_size()` to ensure that the size of the object structure is within 6 words.
+    It is recommended to use `mrb_static_assert_object_size()` to ensure that the size of the object structure is within six words.
 - Delete this file from the destination of the copy.
 
 If you wish to use it as an alternative to the `mruby-bigint` provided by mruby, please leave the GEM name in `<gem-dir>/mrbgem.rake` as it is.
 This is an important factor when it is depended from other GEMs with `spec.add_dependency 'mruby-bigint'`.
 
-The name of the top directory of GEM can be changed arbitrarily.
-The name of the git repository can also be changed arbitrarily.
+The name of the top directory of the GEM can be changed arbitrarily.
+The name of the Git repository can also be changed arbitrarily.
 
-Note that there is no need for an initialization function as there is in normal GEM.
+Note that there is no need for an initialization function as there is in a normal GEM.
 If you need it, create a file `<gem-dir>/src/bigint.c` for example, and implement the `mrb_mruby_bigint_gem_init()` function.